Supported AD topology - Two forests with one domain in each

Hi all,
I've been tasked with deploying Lync in our environment and I've hit a wall in regards to Lync's AD topology support, my environment is as follows:
Two forests and each one has a single domain in it. There is a two-way trust relationship between the forests.
All of our user accounts and computer accounts are in Domain A (in Forest A)
All of our server accounts and mailboxes (linked with user account in Domain A) are in Domain B (in Forest B)
If I was to deploy Lync Server in Domain B (Forest B), can my users in Domain A (Forest A) access Lync with all functionality? Are there any special considerations I need to take into account?
Many thanks,
Craig

Hi,
It is supported by Microsoft for your Lync topology.
For your Lync topology, it is called Multiple Forests, Central Forest. The resource forest hosts only enterprise application servers and does not contain any primary user accounts. The primary user accounts from other forests are represented as disabled
user accounts. An ObjectSID of primary user account (from account forest) is mapped to corresponding disabled user account msRTCSIP-OriginatorSID attribute. These disabled user accounts are enabled for Lync Server 2010 and mail-enabled for Microsoft Exchange
Server if it is deployed.
You can refer to the link below to deploy Resource Forest Topology for Lync Server 2010:
http://technet.microsoft.com/en-us/library/gg670909(v=ocs.14).aspx
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

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